Nav aids · North Sea long running 17 91 5 482 — Exercises · Adriatic Sea 14 18.8 1 27 — Exercises · North Pacific Ocean 13 47 2 25 — Cable ops · Irish Sea and St. George's Channel 10 24.1 0 — — Nav aids · English Channel 8 24.4 0 — — Spills · Gulf of Mexico 7 68 4 40 — Cable ops · Celtic Sea 7 39.5 1 74 — Exercises · North Atlantic Ocean 7 22.2 1 32 — Cable ops · English Channel 7 21.1 1 27 — Nav aids · South Atlantic Ocean 5 228.9 8 324 — Derelicts · North Atlantic Ocean 5 65.4 1 28 — Missiles · North Pacific Ocean 5 54 2 32 — Incidents · South Pacific Ocean long running 5 41 2 390 — Cable ops · North Atlantic Ocean 5 22 2 33 — Quakes · Solomon Sea 5 15 0 — — Cable ops · North Sea 5 8.9 1 35 — Incidents · South Atlantic Ocean long running 4 73.7 2 573 — Exercises · Aegean Sea 4 60.2 1 55 — Icebergs · North Atlantic Ocean 4 54.6 2 38 — Icebergs · Labrador Sea 4 33.3 2 25 — Quakes · South Pacific Ocean 4 12.7 0 — — Other · Ionian Sea 4 11.7 2 6 — Nav aids · Irish Sea and St. George's Channel 4 3.8 0 — — Nav aids · Mediterranean Sea - Western Basin 3 143.8 5 292 — Nav aids · North Atlantic Ocean long running 3 138.6 4 822 — Containers · North Atlantic Ocean 3 108.6 4 63 — Nav aids · Inner Seas off the West Coast of Scotland 3 67.9 5 59 — Nav aids · Celtic Sea 3 61.6 2 159 — Spills · North Pacific Ocean 3 42 1 25 — Quakes · North Pacific Ocean 3 39.8 1 208 — Surveys · North Atlantic Ocean 3 31.8 0 — — Cable ops · Mediterranean Sea - Eastern Basin 3 19.4 0 — — Cable ops · South China Sea 3 11.8 1 22 — Quakes · Coral Sea 3 9 0 — — Quakes · Indian Ocean 3 9 0 — — Nav aids · Tyrrhenian Sea long running 2 181.9 5 769 — Incidents · North Atlantic Ocean long running 2 123 5 1,320 — Nav aids · Coral Sea 2 37.8 1 96 — Surveys · Adriatic Sea long running 2 29.5 1 430 — Nav aids · Bristol Channel long running 2 28.7 1 605 — Containers · Persian Gulf 2 20.2 1 20 — Exercises · Tyrrhenian Sea 2 10.6 1 11 — Cable ops · North Pacific Ocean 2 9.6 1 7 — Nav aids · Bass Strait 2 9.4 0 — — Cable ops · Java Sea 2 8.2 0 — — Surveys · Irish Sea and St. George's Channel 2 6.2 0 — — Quakes · Arctic Ocean 2 6 0 — — Quakes · Makassar Strait 2 6 0 — — Quakes · Philippine Sea 2 6 0 — — Exercises · Ligurian Sea 2 5.9 0 — — Incidents · North Pacific Ocean 2 0.7 0 — — Other · South Pacific Ocean 1 68.5 2 57 — Nav aids · South Pacific Ocean long running 1 64 1 883 — Derelicts · South China Sea 1 52.1 2 36 — Cable ops · South Atlantic Ocean 1 41.9 1 79 — Nav aids · Mozambique Channel 1 39.1 2 134 — Ordnance · North Atlantic Ocean 1 36.6 1 163 — Other · South Atlantic Ocean 1 34.8 2 124 — Nav aids · Caribbean Sea 1 29.2 1 340 — Incidents · Caribbean Sea long running 1 28.9 1 766 — Surveys · North Sea long running 1 28.3 1 462 — Spills · North Atlantic Ocean 1 28 0 — — Exercises · Mediterranean Sea - Western Basin 1 26.5 0 — — Exercises · Caribbean Sea 1 26.2 0 — — Exercises · Malacca Strait 1 25.4 0 — — Incidents · North Sea 1 24 1 23 — Nav aids · Solomon Sea 1 20.3 1 203 — Exercises · Mediterranean Sea - Eastern Basin 1 18.5 0 — — Debris · North Atlantic Ocean 1 17.2 1 17 — Spills · Caribbean Sea 1 14 0 — — Surveys · Tyrrhenian Sea 1 12.5 1 12 — Spills · Gulf of Alaska 1 11 1 11 — Cable ops · Indian Ocean 1 10.6 1 54 — Spills · Bering Sea 1 10 1 10 — Cable ops · Eastern China Sea 1 9.4 1 47 — Cable ops · Gulf of Guinea 1 8.6 1 8 — Wrecks · Mediterranean Sea - Western Basin 1 8.1 1 8 — Nav aids · Ionian Sea 1 8 1 7 — Other · North Pacific Ocean 1 6.7 0 — — Nav aids · Great Australian Bight 1 6.1 1 6 — Ordnance · Gulf of Aden 1 3.3 0 — — Surveys · English Channel 1 3.1 0 — — Quakes · Bismarck Sea 1 3 0 — — Quakes · Ceram Sea 1 3 0 — — Quakes · Sea of Okhotsk 1 3 0 — — Quakes · South China Sea 1 3 0 — — Cable ops · Mediterranean Sea - Western Basin 1 2.5 0 — — Debris · Adriatic Sea 1 2 1 1 — Debris · Mediterranean Sea - Western Basin 1 2 0 — — Quakes · Southern Ocean 1 1.7 1 1 — Quakes · South Atlantic Ocean 1 1.5 1 1 — Containers · North Sea 1 1.3 0 — — Nav aids · Tasman Sea 1 1.2 0 — — Debris · North Sea 1 1 0 — — Derelicts · Philippine Sea 1 0.6 1 0 — Surveys · Mediterranean Sea - Eastern Basin 1 0.5 0 — — Exercises · South China Sea 1 0.4 1 0 — Incidents · Mediterranean Sea - Eastern Basin 1 0.2 1 0 — Surveys · Ionian Sea 1 0.1 0 — — Debris · Mediterranean Sea - Eastern Basin 1 0 0 — — Incidents · Philippine Sea 1 0 0 — — Other · North Sea long running 0 112 4 661 — War risk · Persian Gulf long running 0 112 4 614 — Other · North Atlantic Ocean long running 0 84 3 881 — Nav aids · Persian Gulf long running 0 84 3 398 — Wrecks · North Sea 0 81 2 257 — Cable ops · Persian Gulf 0 56 2 262 — Wrecks · Persian Gulf long running 0 56 2 1,507 — Surveys · South Atlantic Ocean long running 0 56 2 398 — Nav aids · Adriatic Sea long running 0 53 1 561 — Derelicts · Indian Ocean long running 0 46 1 623 — Missiles · North Atlantic Ocean 0 39 1 195 — Nav aids · North Pacific Ocean long running 0 39 1 960 — Surveys · Mediterranean Sea - Western Basin 0 29 0 — — Other · Adriatic Sea long running 0 28 1 804 — Nav aids · Bismarck Sea 0 28 1 50 — Towing · Black Sea long running 0 28 1 678 — Containers · Celtic Sea long running 0 28 1 549 — Ordnance · English Channel long running 0 28 1 592 — Other · Gulf of Mexico long running 0 28 1 757 — Nav aids · Gulf of Suez 0 28 1 268 — Other · Labrador Sea long running 0 28 1 921 — Nav aids · Ligurian Sea 0 28 1 77 — Incidents · Ligurian Sea long running 0 28 1 818 — Other · Makassar Strait 0 28 1 132 — Wrecks · Malacca Strait long running 0 28 1 844 — Nav aids · Mediterranean Sea - Eastern Basin long running 0 28 1 489 — Cable ops · Mozambique Channel 0 28 1 163 — Incidents · Mozambique Channel 0 28 1 40 — Restricted · North Atlantic Ocean 0 28 1 348 — Derelicts · North Pacific Ocean long running 0 28 1 826 — Volcanic · North Pacific Ocean 0 28 1 30 — Mines · North Sea 0 28 1 354 — Structures · Persian Gulf 0 28 1 172 — Other · Red Sea long running 0 28 1 1,178 — Incidents · South China Sea long running 0 28 1 1,075 — Wrecks · South China Sea 0 28 1 78 — Nav aids · Sulu Sea 0 28 1 126 — Other · Tyrrhenian Sea 0 28 1 258 — Spills · Tyrrhenian Sea 0 28 1 95 — Wrecks · Tyrrhenian Sea 0 28 1 129 — Nav aids · Black Sea 0 25 0 — — Containers · South Atlantic Ocean 0 25 0 — — Nav aids · Philippine Sea 0 18 0 — — Volcanic · Philippine Sea 0 18 0 — — Nav aids · Indian Ocean 0 17 0 — — Nav aids · Timor Sea 0 11 0 — — Other · Irish Sea and St. George's Channel 0 10 0 — — Surveys · Caribbean Sea 0 9 0 — — Mines · North Pacific Ocean 0 6 0 — — Surveys · Ligurian Sea 0 4 0 — — Incidents · Red Sea 0 4 0 — — Cable ops · Aegean Sea 0 3 0 — — Icebergs · Indian Ocean 0 2 0 — — Surveys · Celtic Sea 0 1 0 — — Wrecks · Irish Sea and St. George's Channel 0 0 0 — — Surveys · Japan Sea 0 0 0 — —